ACA Magnitude Statistics

2026:278:00:00:49.010 Update Report

Time range 2026:188:00:00:48.832 – 2026:278:00:00:48.832
Stars 43
Failures 0

Stars

AGASC ID Last Obs nobs nbad nfail fok fmag est ok 3 f5 arcsec magcatalog magobs δmag cat δmag/σmag δmag δσ color
115212768 2026:200 3 1 99.8% 90.8% 100.0% 9.96 ± 0.02 10.05 ± 0.11 0.09 4.31 – – 0.62
115212888 2026:200 14 1 99.2% 99.1% 100.0% 9.08 ± 0.02 9.12 ± 0.04 0.04 1.91 – – 0.62
115213096 2026:200 9 1 98.1% 97.4% 100.0% 9.66 ± 0.02 9.69 ± 0.07 0.03 1.36 – – 0.64
115213248 2026:200 2 1 99.8% 92.5% 100.0% 9.91 ± 0.02 9.89 ± 0.04 -0.01 -0.63 – – 1.02
189400120 2026:200 8 1 99.8% 99.8% 100.0% 8.15 ± 0.02 8.16 ± 0.03 0.01 0.45 – – 0.66
189401024 2026:200 15 1 99.7% 99.7% 100.0% 8.66 ± 0.02 8.68 ± 0.03 0.03 1.41 – – 1.16
189403680 2026:200 16 1 99.6% 99.6% 100.0% 8.82 ± 0.02 8.85 ± 0.04 0.02 1.08 – – 1.25
189408840 2026:200 10 1 99.8% 99.8% 100.0% 7.06 ± 0.02 7.06 ± 0.04 0.01 0.27 – – 0.08
189409936 2026:200 9 1 99.1% 99.1% 100.0% 8.81 ± 0.02 8.83 ± 0.03 0.02 0.97 – – 1.18
189410648 2026:200 16 1 99.9% 99.9% 100.0% 8.10 ± 0.02 8.12 ± 0.03 0.01 0.71 – – 1.21
189411792 2026:200 19 1 99.9% 99.9% 100.0% 7.89 ± 0.02 7.89 ± 0.03 0.00 0.12 – – 1.26
189414512 2026:200 3 1 100.0% 100.0% 100.0% 7.94 ± 0.02 7.94 ± 0.03 -0.00 -0.05 – – 0.83
189419528 2026:200 5 1 100.0% 100.0% 100.0% 6.30 ± 0.02 6.29 ± 0.04 -0.01 -0.44 – – 1.18
301078672 2026:193 3 1 100.0% 100.0% 100.0% 6.80 ± 0.02 6.79 ± 0.03 -0.01 -0.37 – – 0.79
301078856 2026:193 4 1 99.1% 99.1% 100.0% 8.76 ± 0.02 8.78 ± 0.03 0.02 1.25 – – 1.27
301078936 2026:193 2 1 99.0% 98.9% 100.0% 8.85 ± 0.02 8.85 ± 0.03 -0.00 -0.11 – – 1.23
301081112 2026:193 4 1 99.0% 98.9% 100.0% 9.45 ± 0.02 9.45 ± 0.04 -0.01 -0.32 – – 1.23
305666480 2026:193 3 1 99.5% 99.5% 100.0% 8.07 ± 0.02 8.07 ± 0.03 0.01 0.28 – – 0.66
305672248 2026:193 4 1 100.0% 100.0% 100.0% 8.09 ± 0.02 8.11 ± 0.03 0.02 1.19 – – 1.66
305672944 2026:193 2 1 100.0% 100.0% 100.0% 7.49 ± 0.02 7.49 ± 0.03 -0.00 -0.18 – – 1.08
330575808 2026:193 2 1 99.9% 99.9% 100.0% 8.22 ± 0.02 8.25 ± 0.03 0.03 1.46 – – 0.97
330579000 2026:193 2 1 100.0% 100.0% 100.0% 6.46 ± 0.02 6.47 ± 0.03 0.01 0.48 – – 1.25
751962472 2026:193 4 1 98.7% 98.7% 100.0% 8.68 ± 0.02 8.69 ± 0.03 0.01 0.49 – – 1.54
751964920 2026:193 6 1 99.3% 99.3% 100.0% 8.51 ± 0.02 8.53 ± 0.03 0.02 1.02 – – 2.22
751965256 2026:193 7 1 100.0% 100.0% 100.0% 7.08 ± 0.02 7.09 ± 0.03 0.01 0.41 – – 0.47
827337336 2026:193 4 1 99.2% 99.2% 100.0% 8.07 ± 0.02 8.09 ± 0.03 0.02 1.24 – – 1.87
827337504 2026:193 3 1 94.2% 94.0% 100.0% 9.42 ± 0.02 9.38 ± 0.03 -0.05 -2.30 – – 2.74
827459448 2026:193 2 1 100.0% 100.0% 100.0% 9.11 ± 0.02 9.17 ± 0.03 0.06 3.13 – – 0.84
827460024 2026:193 3 1 98.1% 98.1% 100.0% 8.66 ± 0.02 8.69 ± 0.03 0.04 1.88 – – 1.45
828113688 2026:192 4 1 99.8% 99.7% 100.0% 8.07 ± 0.02 8.17 ± 0.03 0.09 4.64 – – 1.40
828124288 2026:192 4 1 99.9% 99.9% 100.0% 8.05 ± 0.02 8.08 ± 0.04 0.02 1.10 – – 0.58
828125584 2026:192 3 1 99.8% 99.8% 100.0% 7.82 ± 0.04 7.85 ± 0.03 0.03 0.81 – – 1.33
828126968 2026:192 3 1 99.1% 98.5% 99.9% 9.22 ± 0.02 9.29 ± 0.04 0.07 3.33 – – 1.70
828638624 2026:192 3 1 99.4% 99.2% 100.0% 9.17 ± 0.02 9.19 ± 0.03 0.02 0.92 – – 1.56
828643480 2026:192 4 1 99.7% 99.7% 100.0% 8.36 ± 0.02 8.42 ± 0.03 0.06 2.80 – – 0.56
828768728 2026:192 4 1 99.9% 99.9% 100.0% 7.43 ± 0.02 7.48 ± 0.03 0.05 2.66 – – 0.01
897598640 2026:200 5 1 99.9% 99.9% 100.0% 8.51 ± 0.02 8.56 ± 0.04 0.05 2.49 – – 1.92
897614272 2026:200 9 1 99.1% 99.1% 100.0% 8.74 ± 0.02 8.73 ± 0.04 -0.02 -0.81 – – 0.23
898908232 2026:192 3 1 100.0% 100.0% 100.0% 7.78 ± 0.02 7.80 ± 0.03 0.02 1.01 – – 0.52
898912160 2026:192 2 1 99.9% 99.9% 100.0% 8.79 ± 0.02 8.83 ± 0.04 0.04 1.93 – – 2.86
899424232 2026:192 4 1 99.9% 99.9% 100.0% 8.47 ± 0.02 8.50 ± 0.05 0.03 1.38 – – 1.41
899424504 2026:192 3 1 100.0% 99.8% 100.0% 8.26 ± 0.02 8.32 ± 0.03 0.06 3.00 – – 2.41
899551424 2026:192 4 1 99.4% 99.3% 100.0% 8.77 ± 0.02 8.79 ± 0.04 0.02 0.92 – – 1.79

  • sample: One sample of ACA image telemetry. This could be a real image readout or it could be a null 4x4 image when the ACA is not tracking. Be aware that the sample period is faster for null 4x4 images (1.025 sec) than for typical 6x6 or 8x8 tracked images (2.05 or 4.1 sec respectively).
  • Kalman samples: Subset of samples when ACA could be tracking stars (AOPCADMD == NPNT & AOACASEQ == KALM)
  • dr3: Subset of tracked Kalman samples with radial centroid residual < 3 arcsec. This corresponds to "high quality" readouts. This effectively includes the track subset (AOACFCT == TRAK) because readouts with no TRAK are assigned an infinite centroid residual.
  • dbox5: Subset of tracked Kalman samples with centroid residual within a 5 arcsec box. This corresponds to spatial filter used by the OBC for inclusion in Kalman filter. This effectively includes the track subset (AOACFCT == TRAK) because readouts with no TRAK are assigned an infinite centroid residual.
  • track: Subset of Kalman samples where the image is being tracked (AOACFCT == TRAK)
  • sat_pix: Subset of Kalman samples with saturated pixel flag OK (AOACISP == OK)
  • ion_rad: Subset of Kalman samples with ionizing radiation flag OK (AOACIIR == OK)
  • mag_est_ok: Subset of Kalman samples that have a magnitude estimate (track & ion_rad)
  • n_total: Total number of sample regardless of OBC PCAD status
  • n: Synonym for n_total
  • n_kalman: Number of Kalman samples
  • n_dr3: Number of dr3 samples.
  • n_dbox5: Number of dbox5 samples.
  • n_track: Number of track samples.
  • n_ok_3: Number of (track & sat_pix & ion_rad & dr3) samples
  • n_ok_5: Number of (track & sat_pix & ion_rad & dbox5) samples
  • n_mag_est_ok: Number of (track & ion_rad) samples
  • n_mag_est_ok_3: Number of (track & ion_rad & dr3) samples
  • n_mag_est_ok_5: Number of (track & ion_rad & dbox5) samples
  • f_dr3: Fraction of mag-est-ok samples with centroid residual < 3 arcsec((mag_est_ok & n_dr3)/n_mag_est_ok)
  • f_dbox5: Fraction of mag-est-ok samples with centroid within 5 arcsec box((mag_est_ok & n_dbox5)/n_mag_est_ok)
  • f_mag_est_ok: n_mag_est_ok_3/n_kalman. This is a measure of the fraction of time during an observation that a magnitude estimate is available.
  • f_mag_est_ok_3: n_mag_est_ok_3/n_kalman.
  • f_mag_est_ok_5: n_mag_est_ok_5/n_kalman.
  • f_ok: n_ok_5 / n_kalman. Same as f_ok_5
  • f_ok_3: n_ok_3 / n_kalman. This is a measure of the fraction of time during an observation that the Kalman filter is getting high-quality star centroids.
  • f_ok_5: n_ok_5 / n_kalman. This is a measure of the fraction of time during an observation that the Kalman filter is getting any star centroid at all. This includes measurements out to 5 arcsec box halfwidth, so potentially 7 arcsec radial offset.